Snap socket-shell.



G. D. PLATT. SNAP SOCKET SHELL. AYPLIUATION FILED JULY 8, 1908. RENEWED JULY 2, 1913.

1,086,080, Patented Feb. 3, 1914 auuemtofa Wibmeoogo: j a p MA/QT- p STATES PATENT oFuIo winter; 1). PLATT, or :enrnenron'r, CONNECTICUT, ASSIGNOR To HENRY 1). means, orBosToN, MASSACHUSETTS.

SNAP SOCKET-SHELL.

I Specification of Letters Patent.

Application filed July 8, 1908, Serial Iio.'442.599. Renewed July 2, 1913. Serial No. 777,099.

To all whom it may concern Be-it known that I, Cmiiexon D. PLATrr,

Bridgeport, county of Fa-irfield, State of Connecticut, have'invented a new and useful Snap This invention has-for-its object to pro- Qvide simple and inexpensive means for locking the members of electric socket shells together, important features of the invention beingthat the cost of production is reduced to'the minimum, the ,use'of threads, bayonet joints and screws bing. av0ided and the Darts formed complete by fewand simple mechanical operations: that the parts are locked against longitudinal gagementth'emembers are locked. against anymovement Whatever. With these and other objects in view I have devisedthe simple and novel mode of attaching the members of an electric socket shell together which I will now describe, referring to the accompanying drawing forming apart of this specification and usingreference characters to indicatethe several parts Figure l is an elevation of my novel socket shell-with the members locked' together; Fig. 2 a lan viewof the body on an enlarged sca e; Fig. 3 a detail sectional view on the line 3-3 in Fig. 2, looking in the direction of the arrow; and Fig. 4 is a similar view, the upper end of the body being pressed'inward to disengage the locking lug trom the locking slot. r y

10 and 11 denote the members. 10 indicating the body and 11 the capof an electric socket shell. The body is provided at its upperendgwith the usual slot, indicated by :12, to receive-the,- key of the" switch (not shown), with attaching lugs 13 and with a locking lug 14 placed near the key slot. The

attachmglugs are formed by pressing outmg shoulders indicated by 16. The locking 1 ug is likewise formed by pressing'out the metal of the body and is preferably placed Vertically above one of the attaching lugs so that said lugs may be formed at the same operation. The locking lug is rounded as Socket-Shell, of which the follow -v -ingiis a specification.

detachment when-merely pushed together, and thatwyhen the locking lug and locking recess are in en at 17 so as not to' interfere with the attach- Patented-Feb. 3,1914.

ment and detachment of the parts and is lower end with an an ular internal locking shoulder 19 and with alocking recess 20, the

side walls of which are adapted to beengaged by the locking shoulders 18 of the locking lug when in the engaging position.

The operation is as follows: The lower end of the cap receives the .upper end of the body. The members are attached by'simply moving them together longitudinally in any circumferential position and the locking against withdrawal is eiiected the; instant the internal shoulder on the cap passes over the attaching lugs on the body, and the parts are locked against any movement by rotating one partrelatively to the other until the locking lug snaps into the locking recess. haveshown a socket shell three attaching lugs. It will be obvious, however, that the number of these lugs is wholly unimportant. so far as the principle of the invention is concerned. As the upper ends of both the locking and attaching lugs are'rounded, it is perfectly easy to slide the two parts together, the spring of the metal permitting the annularshoulderon the cap to pass freely over the lugs. As soon as the annular shoulder has passed the attaching lugs, however, the locking shoulders 16- on said lugs will engage the annular shoulder and lock the parts securely against withdrawal but not against rotation. Partial rotation of tht cap and body relatively to each other will place-the locking lug on the body in alinement with the locking recess in the cap, the locking lug snapping to place and the locking shoulders 18 thereon engaging the sidewalls of the recess and .eflectually locking the parts against any movement. -To detach the cap the operator simply presses inward slightly upon" the body sufliciently to disengage the locking lug from the locking recess. The capfmay then be readily removed, the side of the cap having the locking recess .being raised first. Having thus described my. invention, I claim': 1. A socket shell comprising members provided with means for attaching the same together, said means consisting of attaching lugs and a locking lug upon one part and an internal annular shoulder and a. locking-re- I provided with cess upon the other part, said members engaging when moved together longitudinally and locking when rotated after engagement.

2. A socket shell comp-rising a body and a cap, said parts being provided respectively with attaching. lugs and locking lugs and with an internal annular shoulder and a locking recess, so that said parts will be attached when moved together longitudinally in any position and locked against anymovement when rotated to place the locking lug in engagement with the locking recess.

3. An electric. lamp socket having a shell and cap fitting together telescopically and rovided with automatic latching means rought into engagement by simple endwise' movement of the parts with relation to each other, in any relative rotaryposition of the said parts, said cap and shell being provided with means to prevent the shell from turning when so latched, said parts being readily detachable from each other.

4. An electric lamp socket having shell and cap, together with readily freed engaging means therefor latching in any relative rotary position of the parts and means for preventing rotary movement of the parts with relation to each other.

In testimony whereof I aflix my signature,

in presence of two witnesses.

CLARENCE D. PLATT. WVit-nesses I A. M. Woos'rnn,

S. \V. ATHERTON. 

